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Hugo Ledoux

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Founded in 2015 Faculty of the Built Environment & Architecture TU Delft, the Netherlands Brief overview

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The team

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Our (over-the-top) website

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Urban environment and 3D geoinformation Our focus

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6 Whole North Rhine- Westphalia: 10M+ LoD2 buildings More and more 3D data from cities

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New York City More and more 3D data from cities

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8 Helsinki: with textures More and more 3D data from cities

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9 Whole of the Netherlands in LoD2.2 More and more 3D data from cities

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Why 3D geoinformation?

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solar potential shadow analysis noise modelling energy estimation bomb detonation wind turbulence pollutant tracking

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12 3D use in mainstream media: NY Times https://www.nytimes.com/interactive/2016/12/21/upshot/Mapping-the-Shadows-of-New-York-City.html

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Some projects

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https://3dbag.nl all 10M+ buildings in the Netherlands Point cloud (AHN3) Footprint (BAG) + X 10,000,000 100% automatic

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https://3dbag.nl • Collaborations between https://3dgi.nl and us • Whole workflow is (will be soon!) 100% open-source • Roofer: C++ library for LoD2.2 reconstruction • Pipeline from raw data to buildings in DBMS + CityJSON

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Another 3D reconstruction: City3D! Airborne LiDAR LoD2 building model

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Highly-detailed reconstruction 3D trees from laser scanning 3D buildings from drones Check our website for code!

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AI for understanding 3D textured meshes Funded by Cyclomedia

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Semantic segmentation of 3D meshes

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Semantic segmentation of 3D meshes

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Quality control of 3D city models Automatic repairing of broken 3D city With my colleague John Zhao, we’re making an overview of the most common errors/problems, such as: 12 http://geovalidation.bk.tudelft.nl/val3dity/

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Wind simulation in cities

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City4CFD: reconstruct CFD input automatically Only open-source software is used OpenFOAM

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LoD1.2 LoD2.2 UAV safety maps over urban environments

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SCIENCES, Marie Curie grant Energy and CFD modelling to minimize energy usage

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28 • community standard • compliant with CityGML v3.0 • subset of CityGML (~90% of features) • software for full conversion CityGML <-> CityJSON • several software support CityJSON new! CityJSON v2.0

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29 CityGML = 3.0GB (but 1GB of spaces/CRs/tabs!) CityJSON = 292MB Compression of files: Zürich LoD2 buildings

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GeoBIM integration

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32 RhinoCityJSON

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33 ● Generaties City models’ geometries and attributes in BIM environment ● Reprojecting and translating data based on metadata and coordination referencing systems (CRS) ● Available at Autodesk App Store as a free featured app CityJSON importer for Autodesk Revit

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[email protected] ➡ https://3d.bk.tudelft.nl more info than you probably need! projects, papers, code, etc 2 courses are open (book+YouTube): • terrain modelling (AHN4) • 3D modelling for the built environment Thank you